Out of this World Chili

-5 lbs stew beef, cut into 1/2 to 1 in. cubes (any cut of beef will do)
2 large green bell peppers, diced
5-6 stalks celery, sliced thick
2 large Spanish onions, coarsely chopped
3 Tbs. fresh cilantro, minced
4 chipotle peppers, minced
4 large, mild chile peppers, skinned, seeded & chopped
2 28 oz. cans diced tomatoes, drained
8 cloves garlic, crushed or minced

Seasoning Mix:
1 15 oz. can tomato sauce
1 can beef broth
2 Tbs. Worcestershire sauce
6-8 Tbs. chili powder
1 Tbs. salt
1 tsp. black pepper
1 Tbs. sugar
2 Tbs. ground cumin
1 tsp. dried marjoram leaves
1 Tbs. dried Mexican oregano leaves
2 Tbs. masa harina
3 Tbs. tapioca thickener

Preheat oven to 250 F.

Place beef, peppers and other vegetables in Dutch oven or enameled roasting pan, and mix together (do not brown meat.)

Using a blender, blend seasoning mix ingredients together. Pour Seasoning Mix over ingredients in roasting pan and Mix well.

Cover and place pan in oven. Cook for 5 to 6 hours or until beef is tender and sauce has thickened.